I have the large hose coming from the evap canister in the rear of my xj and it goes nowhere. It stops underneath the car where the brake pedal is. I think its supposed to go to the evap pump but my jeep doesn't have one. I bought it 2 years ago. I don't want to leave it open there. Should I put in a pump? Plug it? The OEM manual says some came with the pump and some didn't. Thanks, Dave